import sqlite3
import xlwt
import urllib.error
import urllib.request
import re
from bs4 import BeautifulSoup


def main():
    baseurl = "https://movie.douban.com/top250?start="
    # 1.爬网页
    datalist = getData(baseurl)
    savepath = "豆瓣电影Top250.xls"
    # dbpath = "movie.db"
    # 3.保存数据
    saveData(datalist,savepath)
    # saveData2DB(datalist,dbpath)


# 影片详情规则
findLink = re.compile(r'<a href="(.*?)">')  # 创建正则表达式对象,表示规则
# 影片图片
findImgSrc = re.compile(r'<img.*src="(.*?)"', re.S)  # re.S让换行符包含在字符中
# 影片的片名
findTitle = re.compile(r'<span class="title">(.*)</span>')
# 评分
findRating = re.compile(
    r'<span class="rating_num" property="v:average">(.*)</span>')
# 评价人数
findJudge = re.compile(r'<span>(\d*)人评价</span>')
# 概况
findInq = re.compile(r'<span class="inq">(.*)</span>')
# 影片相关内容
findBd = re.compile(r'<p class="">(.*?)</p>', re.S)


# 爬网页


def getData(baseurl):
    datalist = []
    for i in range(0, 10):
        url = baseurl + str(i*25)
        html = askURL(url)
        # 2.逐一解析数据
        soup = BeautifulSoup(html, "html.parser")
        # 查找符合要求的字符串,形成列表
        for item in soup.find_all('div', class_="item"):
            # print(item)
            data = []  # 保存1部电影的所有信息
            item = str(item)
            # 影片详情链接
            link = re.findall(findLink, item)[0]  # re库通过正则表达式查找指定的字符串
            data.append(link)  # 添加链接
            imgSrc = re.findall(findImgSrc, item)[0]
            data.append(imgSrc)  # 添加图片
            titles = re.findall(findTitle, item)  # 片名可能只有一个
            if(len(titles) == 2):
                ctitle = titles[0]  # 添加中国名
                data.append(ctitle)
                otitle = titles[1].replace("/", "")  # 去掉无关符号
                data.append(otitle)  # 添加外国名
            else:
                data.append(titles)
                data.append(' ')  # 留空

            rating = re.findall(findRating, item)[0]
            data.append(rating)  # 添加评分

            judgeNum = re.findall(findJudge, item)[0]
            data.append(judgeNum)  # 添加评价人数

            inq = re.findall(findInq, item)
            if len(inq) != 0:
                inq = inq[0]
                data.append(inq)  # 添加概述
            else:
                data.append(" ")  # 留空
            bd = re.findall(findBd, item)[0]
            bd = re.sub('<br(\s+)?/>(\s+)?', " ", bd)  # 去掉<br/>
            bd = re.sub('/', " ", bd)  # 替换/
            data.append(bd.strip())  # 去掉前后空格

            datalist.append(data)  # 把处理好的一部电影信息放入datalist
    # print(datalist)
    return datalist

# 得到指定一个URL的网页内容


def askURL(url):
    head = {
        "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36"}
    request = urllib.request.Request(url, headers=head)
    html = ""
    try:
        response = urllib.request.urlopen(request)
        html = response.read().decode("utf-8")
        # print(html)
    except Exception:
        print("2333")
    return html
# 保存数据

def saveData(datalist,savepath):
    book = xlwt.Workbook(encoding="utf-8",style_compression=0)  # 创建workbook对象

    sheet = book.add_sheet('豆瓣电影Top250',cell_overwrite_ok=True)  # 创建工作表
    # worksheet.write(0,0,'hello') #写入数据,第一个参数是行,第二个是列,第三个是内容
    col = ("电影详情链接","图片链接","影片中文名","影片外国名","评分","评分数","概况","相关信息")
    for i in range(0,8):
        sheet.write(0,i,col[i]) #列名
    for i in range (0,250):
        print("第%d条" %i)
        data = datalist[i]
        for j in range(0,8):
            sheet.write(i+1,j,data[j]) #数据
    book.save(savepath)  # 保存数据表

# def saveData2DB(datalist,dbpath):
#     init_db(dbpath)
#     conn = sqlite3.connect(dbpath)
#     cur = conn.cursor()
#     for data in datalist:
#         for index in range(len(data)):
#             if index == 4 or index == 5:
#                 continue
#             data[index] = '"'+data[index]+'"'
#         sql = '''
#                 insert into movie250(
#                 info_link,pic_link,cname,ename,score,rated,introduction,info)
#                 values(%s)'''%','.join(data)
#         # cur.execute(sql)
#         # conn.commit()
#         print(sql)
#     cur.close()
#     conn.close()

# def init_db(dbpath):
#     sql = '''
#         create table movie250
#         (
#         id integer primary key autoincrement,
#         info_link text,
#         pic_link text,
#         cname varchar,
#         ename varchar,
#         score numeric,
#         rated numeric,
#         introduction text,
#         info text
#         )
#     '''  #创建数据表
#     conn = sqlite3.connect(dbpath)
#     cursor = conn.cursor()
#     cursor.execute(sql)
#     conn.commit()
#     conn.close()
if __name__ == "__main__":
    main()
    # init_db("movietest.db")
    print("爬取完毕")